Selection

Comparability

Outcome

Study

Representativeness of the exposed cohort

Selection of the non-exposed cohort

Ascertainment of exposure

Demonstration that outcome of interest was not present at start of study

Comparability of cohorts on the basis

Assessment of outcome

Was follow-up long enough for outcomes to occur

Adequacy of follow up of cohorts

Total score

Agreement (%)

Risk of Bias

Bromley, et al. 2008 [9]

*

*

*

*

**

*

*

8

90%

Low

Christensen et al. 2013 [10]

*

*

*

*

*

*

*

*

9

100%

Low

Wiggs et al. 2020 [12]

*

*

*

*

**

*

*

8

100%

Low

Wood et al. 2015 [13]

*

*

*

*

*

5

70%

Medium

Rasalam et al. 2017 [14]

*

*

*

*

*

*

6

75%

Medium

Bjork, et al. 2022 [15]

*

*

*

*

**

*

*

*

9

90%

Low

Bjork, et al. 2018 [18]

*

*

*

*

**

*

*

*

9

90%

Low

Bromley, et al. 2013 [19]

*

*

*

*

**

*

*

*

9

90%

Low

Veiby, et al. 2013 [20]

*

*

*

*

*

*

*

*

8

100%

Low